Although Guns N’ Roses‘ Not in This Lifetime tour features the welcome return of the band’s “classic” lineup, Axl Rose hasn’t abandoned his Chinese Democracy era, with three tracks from that 2008 LP now staples of GN’R’s reunion setlists. At Thursday’s concert in Philadelphia, Guns N’ Roses added a fourth Chinese Democracy track to their repertoire as Rose performed “Sorry” alongside Slash and Duff McKagan for the first time.

The “classic” lineup’s version doesn’t stray much from the rendition Rose’s roster performed over 150 times on stage, but Slash delivers a captivating solo in his first live performance of the track. “Sorry” joins “Chinese Democracy,” “This I Love” and “Better” as Chinese Democracy tracks to get the Slash-and-Duff treatment.

As Ultimate Classic Rock notes, “Sorry” isn’t the only post-“classic” GN’R track that might pop up on the Not in This Lifetime tour: Setlists have surfaced with “Slither,” from Slash and McKagan’s Velvet Revolver with singer Scott Weiland, listed as an “alternate” if the band opts to deviate from their setlist.

While GNR’s Not in This Lifetime setlists have largely remained rigid, there have been some surprises throughout the trek, including in Cincinnati and Nashville, where “classic” era drummer Steven Adler rejoined the band on “Out Ta Get Me” and “My Michelle.”